Fruit and vegetable dust and process of making same.



one-billionth HANS FRIEDENTHAL, OF IBERLIN-NICOLASSEE, GERMANY.

FRUIT AND VEGETABLE DUST AND PROCESS OF MAKING SAME.

No Drawing.

To all whom it may concern Be it known that I, Dr. HANS FRIEDEN- THAL, private lecturer at the Berlin University, residing at Fr. Leopoldstrasse 4, Berlin-Nicolassee, Germany, have invented certain new and useful Improvements in Fruit and Vegetable Dust and Processes of Making Same, of which the following is a specification.

It is well known that the digestion of plants,more particularly of vegetables and fruit, is rendered more diliicult owing to the presence of cellular walls inclosing the nourishing substances. If it were. possible to remove or destroy the said walls the digestion and assimilation of vegetables or fruit would be greatly facilitated. This applies not only to human beings, that is convalescents and children, but also to animals. Such vegetables or fruit have also the.further advantage that the labor of mastication is considerably reduced. Hitherto it was however impossible to reduce vegetables to such a fine powder. More particularly, the attempt to grind vegetables between mill stones has hitherto failed as the material became hot and consequently useless. In

certain kinds of vegetables, for instance spinach, the generation of heat is such as to burn the spinach.

The process according to this invention consists in the vegetables being first dried, and then reduced to a coarse powder, which is preferably done in a crushing mill. The

finest particles produced in this preliminary powder of this nature, practically all the nourishing ingredients of vegetables are asvehicle, for instance with milk and other additions.

Specification of Letters Patent.

W gram. In

Patented Mar. 2, 1915.

Application filed July 30, 1913. Serial No. 782,071.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. A process for the manufacture of vegetable dust which consists in drying the vegetable, then grinding it to a coarse powder and {finally removing and collecting the finest dust particles weighing about one one-billionth of a gram each by an air current of low velocity.

2. A process for the manufacture of fruit dust which consists in drying the fruit, then grinding it to a coarse powder and finally removing and collecting the finest dust particles weighing about one one-billionth of a gram each by an air current of low velocity.

3. A process for the manufacture of vegetable dust which consists in drying the vegetable, then grinding it to a coarse powder, removing and collecting the finest dust particles weighing about one one-billionth of a gram each by an air current, then grinding the coarse powder again and removing the dust of the same fineness by an air current until merely the Woody portions are left, the velocity of the air current in each 1nstance being so low, that it will remove only dust of the said fineness.

4. A process for the manufacture of fine fruit powder which consists in drying the fruit, then grinding it to a coarse powder, removing and collecting the finest owder particles weighing about one one-bilhonth of a gram each by an air current, then grinding the coarse powder again and removing the powder of the same fineness by an air current until merely the woody portions are left, the velocity of the air current in each instance being so low, that it will remove only dust of the said fineness.

5. A vegetable dust containmg no wood portions, each particle of said dust weighing less than one one-billionth of a gram.

6. A fine powder of fruit containing no woody portions, each particle of said powder weighing less than one one-bllhonth of a gram.

In testimony whereof I aflix my signature in presence of two witnesses.

WOLDEMAR HAUPT, HENRY HABPER. 

